#![no_std]
#![no_main]
use core::fmt::Write;
use esp32_hal::{
clock::ClockControl,
peripherals::Peripherals,
prelude::*,
rom::{crc, md5},
timer::TimerGroup,
Uart,
};
use esp_backtrace as _;
use nb::block;
#[entry]
fn main() -> ! {
let peripherals = Peripherals::take();
let system = peripherals.SYSTEM.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
let mut timer0 = timer_group0.timer0;
let mut uart0 = Uart::new(peripherals.UART0, &clocks);
timer0.start(1u64.secs());
let data = "123456789";
let sentence = "The quick brown fox jumps over a lazy dog";
writeln!(
uart0,
"Performing CRC calculations on test string \"{data}\""
)
.unwrap();
loop {
let crc_hdlc = crc::crc32_le(!0xffffffff, data.as_ref());
let crc_bzip2 = crc::crc32_be(!0xffffffff, data.as_ref());
let crc_mpeg2 = !crc::crc32_be(!0xffffffff, data.as_ref());
let crc_cksum = crc::crc32_be(!0, data.as_ref());
let crc_kermit = !crc::crc16_le(!0, data.as_ref());
let crc_genibus = crc::crc16_be(!0xffff, data.as_ref());
let crc_rohc = !crc::crc8_le(!0xff, data.as_ref());
let crc_smbus = !crc::crc8_be(!0, data.as_ref());
assert_eq!(crc_hdlc, 0xcbf43926);
assert_eq!(crc_bzip2, 0xfc891918);
assert_eq!(crc_mpeg2, 0x0376e6e7);
assert_eq!(crc_cksum, 0x765e7680);
assert_eq!(crc_kermit, 0x2189);
assert_eq!(crc_genibus, 0xd64e);
assert_eq!(crc_rohc, 0xd0);
assert_eq!(crc_smbus, 0xf4);
let mut md5_ctx = md5::Context::new();
let mut it = sentence.split_whitespace().peekable();
while let Some(word) = it.next() {
md5_ctx.consume(word);
if it.peek().is_some() {
md5_ctx.consume(" ");
}
}
let md5_digest = md5_ctx.compute();
assert_eq!(
md5_digest,
md5::Digest([
0x30, 0xde, 0xd8, 0x07, 0xd6, 0x5e, 0xe0, 0x37, 0x0f, 0xc6, 0xd7, 0x3d, 0x6a, 0xb5,
0x5a, 0x95
])
);
writeln!(
uart0,
"{:08x} {:08x} {:08x} {:08x} {:04x} {:04x} {:02x} {:02x} {}",
crc_hdlc,
crc_bzip2,
crc_mpeg2,
crc_cksum,
crc_kermit,
crc_genibus,
crc_rohc,
crc_smbus,
md5_digest
)
.unwrap();
block!(timer0.wait()).unwrap();
}
}